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Re: Should gcc-4.0 apply mathematical associative rules for addition or multiplication

From: Andrew Pinski <pinskia at physics dot uc dot edu>
To: Fariborz Jahanian <fjahanian at apple dot com>
Cc: gcc at gcc dot gnu dot org, Gabriel Dos Reis <gdr at cs dot tamu dot edu>
Date: Mon, 4 Oct 2004 19:56:27 -0400
Subject: Re: Should gcc-4.0 apply mathematical associative rules for addition or multiplication
References: <A8FEC34A-1658-11D9-957B-000A95BA54A6@apple.com> <m3zn326q4v.fsf@merlin.cs.tamu.edu> <9B544E16-1660-11D9-957B-000A95BA54A6@apple.com>

On Oct 4, 2004, at 7:53 PM, Fariborz Jahanian wrote:

On Oct 4, 2004, at 4:05 PM, Gabriel Dos Reis wrote:
Multiplication on floating point datatypes is *NOT* associative.
Transformations that are predicated on associativity are not
optimizations in that case.  They may be applied only if
-funsafe-transformations.
I don't see this flag defined in gcc-4.0. Are you proposing such a flag?

cc1: error: unrecognized command line option "-funsafe-transformations"

Obvious he means "-funsafe-math-optimizations".

Thanks,
Andrew Pinski

References:
- Should gcc-4.0 apply mathematical associative rules for addition or multiplication
  - From: Fariborz Jahanian
- Re: Should gcc-4.0 apply mathematical associative rules for addition or multiplication
  - From: Gabriel Dos Reis
- Re: Should gcc-4.0 apply mathematical associative rules for addition or multiplication
  - From: Fariborz Jahanian

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